Java Database Connectivity (JDBC)

Hi, I am relatively new to using Hibernate. I have two tables which I have tried to map unsuccesfully.

Table 1:
Primary Key(Instrument) -> Generated using function.

Table 2:
Primary Key(Instrument) -> Referenced from primary key of table 1

Table 3:
Primary Key(Instrument) -> Referenced from primary key of table 2
Additional Column(Parent_Instrument) -> Referenced from the primary key of table 2

So, two columns in Table 3 have to be mapped to the primary key of table 2.

I have tried mapping them but am getting the following error:

Caused by: org.hibernate.MappingException: Repeated column in mapping for entity: com.db.csb.model.securitycreation.entities.tradegate.WiBonds column: INSTRUMENT (should be mapped with insert="false" update="false")
	at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:652)
	at org.hibernate.mapping.PersistentClass.checkPropertyColumnDuplication(PersistentClass.java:674)
	at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:696)
	at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:450)
	at org.hibernate.mapping.RootClass.validate(RootClass.java:192)
	at org.hibernate.cfg.Configuration.validate(Configuration.java:1102)
	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1287)
	at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:807)
	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:740)
	at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:131)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1062)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1029)
	... 32 more

The following is my code:

TABLE 2
@Entity
@Table(name="BOND_SPEC")

@Id
	@GenericGenerator
	@GeneratedValue
	@Column(name="INSTRUMENT", nullable=false,insertable=false,updatable=false)
	public long getInstrument() {
		return instrument;
	}
	public void setInstrument(long instrument) {
		this.instrument = instrument;
	}
@OneToMany
	@JoinColumn(name = "INSTRUMENT", nullable=false, insertable=false)
	public Set<WiBonds> getWiBonds(){
		return Wi_Bonds;
	}
	public void setWiBonds(Set<WiBonds> Wi_Bonds){
		this.Wi_Bonds = Wi_Bonds;
	}

TABLE 3
@Entity
@Table(name="WI_BONDS")
	
	@Id
	@GenericGenerator(name = "fk_bondspec", strategy = "foreign", parameters = { @Parameter(name = "property", value = "BondSpec") })
	@GeneratedValue(generator = "fk_bondspec")
	@Column(name="INSTRUMENT", nullable=false,insertable=false,updatable=false)	
	public long getInstrument() {
		return instrument;
	}
	public void setInstrument(long instrument) {
		this.instrument = instrument;
	}
	
	@ManyToOne(targetEntity = BondSpec.class)
	@JoinColumn(name = "INSTRUMENT", nullable = false, insertable=false, updatable=false)
	public BondSpec getBondSpec() {
	}
	public void setbondSpec(BondSpec bondspec) {
	}
	
	
	@OneToOne(targetEntity = BondSpec.class)
	@JoinColumn(name = "PARENT_INSTRUMENT", nullable = false, insertable = false, updatable = false, unique=true)
	public long getParent_instrument() {
	}
	public void setParent_instrument(long parent_instrument) {
	}

What am I doing wrong?